Shingle-machine.



J. B. NELSON.

SHINGLE MACHINE.

APPLICATION FILED 212.24, 1910.

Patented Aug. 20, 1912.

2 SHEETS-SHEET 1.

511mm to:

J. B. NELSON.

SHINGLE MACHINE.

Arrmonlol FILED FEB.24, 1910.

1 ,O36,308, Patented Aug. 20, 1912.

2 sums-4mm 2.

1 rgj 8141mm l'oz llNlTED STATES PATENT OFFICE.

JOHN BRYAN NELSON, OF BIVINS, TEXAS.

SHINGLE-MACI-IINE.

Application filed February 24, 1910.

To all whom it may concern:

Be it known that I, JOHN B. NELSON, a citizen of the United States,residing at Bivins, in the county of Cass and State of T eXas, haveinvented a new and useful Shingle-Machine, of which the following is aspecification.

This invention relates to improvements in machines for sawing lumberinto shingles, in which a log carriage is provided having a tiltingsupport for the block to be sawed, so that the block may be presented tothe saw at different angles to obtain the proper taper of the shingles.

It is the purpose of the present invention to provide in a machine ofthis kind, a novel construction and arrangement of parts to behereinafter described and claimed, including improved means forautomatically effecting the tilting movement of the log support at theend of the travel of the carriage, and for feeding the block toward thesaw.

A further object of the invention is to provide a structure which iswithout complicated parts, and also to provide a mechanism for thepurpose stated by which the adjustment of the block may be easily andquickly made.

In the accompanying drawings forming a part of this specification,Figure 1 is a plan view of a saw mill carriage showing the applicationof the invention, parts being broken away. Fig. 2 is a rear elevation.Fig. 3 is an enlarged end view, partly broken away.

In the drawings, the saw is indicated at 5, and the carriage at 6, thelatter being mounted on wheels 7, traveling on rails 8. Any suitablemechanism may be provided for reciprocating the carriage.

On the top 9 of the carriage is mounted a table for supporting theblocks which are to be sawed into shingles. This table is pivotallymounted on an axis which is parallel to the plane of the saw, so thatthe shingle blocks may be presented to the saw at difierent angles, inorder that the shingles may have a tapered form. The table comprises aplatform 10, end walls 11, and a rear wall 12. A head block is alsoprovided for feeding the shingle blocks to be Specification of LettersPatent.

Patented Aug. 20, 1912.

Serial No. 545,577.

sawed toward the saw. The head block comprises walls 18 and 1 1 whichare spaced a short distance apart, and work between the end walls 11across the platform 10, toward and from the saw. The mechanism foroperating the head block will be presently described. The pivot of thetable is near its front side, there being standards 15 mounted on theplatform 9 of the carriage 6, near the top of which standards, the walls11 are pivoted as indicated at 16. The end walls 11 and the rear Wall 12are rigidly mounted on the platform 10;

The following means are provided for tilting the table so that theshingle blocks to be sawed may be presented at different angles to thesaw for the purpose already described: On the rear side of the platform10, near the ends thereof, are mounted rotatable shafts 17, each ofwhich carries a thrust member 18 resting on a shelf 19 secured to thecarriage top 9. This member is so shaped that it will alternatelyelevate and lower the free end of the table when theshaft 17 is rotated,said member rotating with the shaft. As shown in the drawings, thethrust member is a block having a greater length than width, the shaft17 extending through said block midway between its ends, so that wheneither end of the block is in engagement with the shelf 19, the free endof the table will be in elevated position, whereas, when the shaft isrotated to bring one of the sides of the block in contact with theshelf, the free end of the table will be lowered, the ends of the blockbeing a greater distance from the shaft 17 than the sides.

For the purpose of automatically effecting the herein described tiltingmovement of the table, there is provided a trip device comprising atrigger 2O pivotally mounted on a post 21 to swing in a horizontalplane, the trigger being horizontally presented. and the post being solocated that the trigger is in the path of cross-shaped radial arms 22on the shaft 17. Each shaft is equipped in this manner, a trip devicebeing provided with each shaft. The post 21 is located adjacent to oneside of the track on which carriage 6 travels, so as to properly locatethe trigger 20 with respect to the arm 22. Ad-

jacent to the post 21 is located the post 23 against which the trigger20 is adapted to swing, there being a spring 24 connected to the triggerto hold the free end of the trigger in engagement with the post 23. Thisarrangement permits the carriage 6 to travel in one direction withoutthe shaft 17 being actuated, the trigger 2O swinging away from the post23. Nhen the carriage travels in the opposite direction, and one of thearms 22 strikes the trigger 20, the latter remains stationary, andthrough the arm 22 causes the shaft 17 to make a quarter turn. The arms22 are so located with respect to the posts 21 and 23, that they passbetween the same. The parts are so arranged that the table is tilted atthe end of the return travel of the carriage, the trigger 20 swingingaway from the post 23 to permit the arms 22 to pass without actuatingthe shaft 17. When the arms 22 clear the trigger 20, the spring 24swings the trigger 20 back against the post 23. The herein describedintermittent move ment of the shaft 17 alternately brings the ends andthe sides of the block 18 into contact with the shelf 19, and the tableis tilted alternately on opposite sides of the horizontal, to vary theangle of the cut.

The following means are provided for operating the head block: On theend walls 11 of the table are mounted bearing brackets 25 supporting ashaft 26 which extends along the rear side of the table. On this shaftare pinions 27 which mesh with rack bars 28 passing loosely throughopenings in the wall 12, and fastened to the wall 14. The walls 13 and14 of the head blockare spaced by blocks 29, and are also connected sothat they will move together. It will be obvious from the foregoing,that upon operating the shaft 26, the pinions 27, through the rack bars28, will advance or retract the head block.

The shaft 26 is operated by means of a hand lever 30 loosely mounted onthe shaft, and carrying a pawl 31 which is engageable with a ratchet 32fast on the shaft. On one of the end walls 11 is also mounted a bracket33 which supports a segment 34,'the said segment having means forlocking the shaft. Said locking means maybe a pin 35 passing through thelever, and through one of a series of holes made in the segment. Thehand lever 30 is provided for rotating the shaft 26 in a direction toadvance the head block, and for retracting the head block, the shaft isfitted with a hand crank 36.

In operation, the shingle blocks to be sawed are advanced after each cutby reciprocating the hand lever 30. After'the last out has been taken,the head block is retracted by rotating the hand crank 36, and the tableis then ready for another supply of shingle blocks. The head block alsocarries dogs for holding the shingle blocks on the table. Each of saiddogs comprises an arm 37 pivoted intermediate its ends at 38 to abracket 39 mounted on the wall 14. The arm is formed at one of its endswith a tooth 40 to bite into the shingle blocks, said tooth being forcedinto the block by means of a spring 41 fastened at one end to the arm,and at the other end to a cross rod 42 mounted between the walls 13 and14 of the head block, the spring being so located as to draw the toothedend of the arm clownwardly, and to cause the tooth to enter the shingleblock.

At the front of the platform 10 are dogs 43 engageable with thebottom ofthe shingle blocks, to prevent the said blocks from slipping when theends are reached.

The length of the saw table will be such that a number of shingle blocksmay be placed thereon, a holding dog 37 being provided for each block.All the blocks abut at their rear ends against the head block, and theyare therefore advanced simulta neously and uniformly when the shaft 26is operated. The tilting of the saw'table is effected automatically, andthe amount of the tilting movement may be varied by providing the shaft17 with different dimensioned blocks 18.

It is to be noted that the posts 21 are so disposed with respect'to thecarriage 6, that the posts serve to hold the carriage on the track,preventing displacement therefrom, when the carriage is reciprocating,More over, by reason of the fact that the shafts 17 protrude beyond thecarriage and the track, the arms 22 being likewise located beyond thecarriage and the track, the arms 22 may be adjusted readily for properengagement with the triggers 20 without entering beneath the carriage,or disturbing the load which is supported upon the table. Moreover,should it be desired to elevate or lower the table manually, when thedevice is not in operation, the arms 22 may be seized, rotating theshafts 17, and adjustingthe position of the thrust members 18.withrespect to the carriage, this operation being consummated from theexterior of the structure, and without difliculty.

What is claimed is:

In a shingle sawing machine, a track; a carriage mounted forreciprocation upon the track; standards upon the carriage; a tablepivotally connected, close to one end, with the standards, the tableincluding a work-holding platform across which the shingle butt may beadjusted transversely of the carriage and'toward and away from theshingle-saw, the platform being located below the pivotal support of'thetable, the table being adapted to move at right angles to the track; ashaft journaled in the table transversely of the track; a thrust memberupon the shaft, and of unequal dimensions, In testimony that I claim theforegoing as the thrust member bein arranged to enmy own, I have heretoaflixed my signature gage the carriage to tilt t e table; the shaft inthe presence of two Witnesses.

being provided upon its outer end and be- JOHN BRYAN NELSON. yond thetrack with radial arms; and means Witnesses:

for engaging the arms successively to im- J. A. SELLERS,

part intermittent rotation to the shaft. W. H. PATE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

7 Washington, D. G.

